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Vibration Suppression”, AIAA Journal, Vol. 50, No. 9 (2012), pp. 2004-2011.
Kanjuro Makihara, Shinsuke Takeuchi, Shigeru Shimose, and Junjiro Onoda.
Department of Aerospace Engineering, Tohoku University, Sendai 980-8579, JAPAN
& Japan Aerospace Exploration Agency, Kanagawa, JAPAN
Abstract
A novel invention, a digital self powered autonomous system is proposed to achieve sophisticated vibration suppression dealing with multimodal vibrations. This vibration suppressor can be used ubiquitously at any site because it does not require an external power supply or central control authority. the digital approach enables the system to be programmed and thus it affords some versatility with regard to control schemes. the proposed system is a vast improvement over conventional analog autonomous systems whose fine-tuning is very difficult. the digital unit can be implemented in multi-input systems to suppress complicated structural vibrations such as multimodal vibrations. this paper provides an analytical discussion on the energy harvesting effect on suppression performance in terms of the power balance and flow. experiments demonstrate that the vibration magnitude reduces dramatically by as much as 79.7% under force excitation, although the self powered control unit is used.
